Apple co-founder Steve Wozniak is the latest in a lineup of entrepreneurs, statesmen and other prominent figures to speak at Cal's commencement ceremony. Twice since 2006, students heard from the university's chancellor instead of the scheduled speakers, who refused to cross the picket lines of striking university workers.

n 2012: Eric Schmidt, Executive Chairman, Google

n 2011: Paul Jacobs, CEO, Qualcomm

n 2010: Tiffany Shlain, founder of the Webby Awards

n 2009: Christopher Gardner, Entrepreneur and Philanthropist

n 2008: Craig Newmark, founder of Craigslist

n 2007: Chancellor Robert Birgeneau instead of actor Danny Glover because of a union protest